Arboricultural assessment & method statement

Arboricultural assessment & method statement Westminster Ceremonial Street Project, The Green Park Wall

Jeremy Barrell BSc FArborA DipArb CBiol FICFor FRICS

30th July 2018

18214‐AA‐300718‐JB

Site location and report purpose

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Arboricultural appraisal and method statement for Westminster Ceremonial Street Project, The Green Park Wall 18214‐AA‐300718‐JB 30/07/18

© Barrell Tree Consultancy 2018

Site location

This aerial image is provided courtesy of Google. The yellow line indicates the approximate site boundary and is illustrative only.

Report purpose

This arboricultural assessment report provides sufficient information for the Local Planning Authority (LPA) to consider the effect of the proposed development on local character from a tree perspective. It is fully compliant with the BS 5837 advice relating to the planning application stage of the process and it meets national standard planning application validation requirements.

More specifically, the development proposal is to remove the existing boundary wall and railings along the north side of The Green Park boundary with Piccadilly, and to install a new wall.

This report includes:

A Tree protection plan illustrating tree locations, categories, the location of the proposed development, and the proposed tree protection measures.

An Arboricultural assessment (section 1 of the report) providing an analysis of the tree issues to assist the LPA in assessing the impact on local character.

An Arboricultural method statement (section 2 of the report) describing how retained trees will be protected and managed during the development activity.

Appendices (Appendix 1 – Background administrative information and data collection; Appendix 2 – Tree schedule and explanatory notes; and, Appendix 3 – QR Codes for SGNs).

A companion document to supplement the main report titled Manual for managing trees on development sites (Version 2.1), which provides explanations of how retained trees will be managed on site in the form of Site Guidance Notes (SGNs) covering the relevant issues.

1: Arboricultural assessment

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1.1 Table 1: Summary of trees affected and protected by the proposal

From my review of the constraints and the proposed layout, my assessment of the impact on trees, both during and after development, and those that need protection using special precautions, is summarised in Table 1:

British Standard 5837 Category

A (High quality) B (Moderate quality) C (Low quality)

Remove None None H35

Prune None None None

Protect using special precautions See Notes below All living trees (T1–T18 & T20–T34)

H = Hedge; T = Tree

Note on types of protection: All retained trees will be protected during development by using fencing and ground protection, and only those requiring special precautions to limit the impact of encroachment are listed in Table 1.

Note on category U trees: Tree 19 is categorised as U because it is dead and is likely to be removed for management reasons irrespective of any development proposals. Removal of category U trees is a management decision and not caused by this proposal, so should not be considered a direct impact.

1.2 Discussion of specific tree issues

RPA adjustment for all the mature plane

All the large plane trees close to the proposed activity are on the Piccadilly boundary. Although there can be little certainty, it is likely that fewer roots extend beneath the road and it would be prudent to extend the notional BS advised RPAs on the Park side to compensate for this. Realistically, it is likely that all the work areas are within RPAs and this report has been prepared based on that assumption.

1.3 The impact of tree removals on local character

No trees are planned to be removed because of this development and so there will be no impact on local character for that reason. Hedge 35 is scheduled for removal, but this is a matter being managed by The Royal Parks and has not been considered in any detail this report. It is replaceable and so any impact can be mitigated by new planting.

1.4 The impact of tree pruning on local character

At this planning stage, it is not anticipated that any trees will be pruned because of this development. There are several low category small trees with small lower branches (less than 5cm diameter) that extend towards some of the work areas. These may need to be reduced in length or removed to allow access, but they are so small that they will not have any significant adverse impact on tree health or overall appearance. However, there is a possibility that some pruning may be required as work progresses due to unavoidable damage to roots that has a knock‐on impact on tree stability. This will be a last resort fall‐back position and, if necessary, the extent of any works will be agreed between all the parties before it is carried out, in accordance with the protocol described in the arboricultural method statement (see note 2 of section 2.4).


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1.5 The impact of works in precautionary areas

All the proposed works will be within RPAs and that encroachment will be managed, as follows:

Arboricultural supervision

All operations that could adversely affect trees will be overseen by the project arboriculturist as explained in section 2 of this report, and in SGN1 Monitoring tree protection.

Protection of the whole site from compaction using fencing and ground protection

Although the locations of the new installations are shown with the yellow outline on the tree protection plan as the principal precautionary areas, those works could extend out into adjacent RPAs, which extend over the whole site, so care must be taken throughout the site. It is proposed to work mainly from the street, where the existing hard surfacing will act as ground protection, and to protect the RPAs within the Park through a combination of fencing and ground protection. The work site will be fenced from the public footpath in the Park by a single continuous fence to prevent work operations extending beyond it into the Park. The precise location of this fence will be adjusted at the time of installation to account for low branches on some of the small trees and some trunks of the larger trees, which may require minor deviations from the location shown on the tree protection plan. The detail of the final location will be agreed on site with the supervising arboriculturist. The secondary function of the fencing will be to control access by the public into the work site. All the unprotected soil between that fence and the hard surfacing on Piccadilly shown in blue on the tree protection plan will be protected with ground protection to prevent any soil compaction through foot or mechanical traffic, and storage. As an additional precaution to protect the trunks of trees within the fencing from accidental damage, they will be individually protected with a robust hoarding.

More detail on how this will be done is explained in section 2 of this report, and in SGN2 Fencing protected trees and SGN3 Ground protection. Adhering to this guidance will allow the trees to be retained without any long term detrimental impact on tree health, and therefore no significant adverse impact on local character.

Removal of the existing wall

The existing boundary wall and railings, and the adjacent hedge will be removed before the new wall is installed. I understand that the hedge will be removed by The Royal Parks in advance of the main construction works, and so I have not dealt with that issue in this report. Once the hedge is gone, the wall will be removed using machines and operatives working from the street, taking care to identify and avoid damage to any significant roots during the operations.

More detail on how this will be done is explained in section 2 of this report, and in SGN8 Removing surfacing and structures in RPAs. Adhering to this guidance will allow the trees to be retained without any long term detrimental impact on tree health, and therefore no significant adverse impact on local character.

Excavating in RPAs

The replacement wall will be along the same line as the existing wall, but its linear support footings may have to extend slightly deeper than the existing wall footings along its full length. Additionally, all the new support piers will require significantly deeper footings than the current wall. The full extent of excavation into undisturbed ground will not be known until the work starts on site, but due to the proximity to large trees, it is possible that conflicts with roots will arise. It is proposed


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to manage these through an agreed customised protocol based on liaison between all the parties on how to react as and when roots are discovered (see Note 2 in section 2.4). This will involve a combination of design flexibility to adjust structure locations, and controlled root pruning. If all parties agree that there is no alternative to substantial root pruning, it may be necessary to crown reduce some trees to address stability concerns. Plane are known to be resilient to significant root and crown pruning, and it is not anticipated that any trees will be lost through the works. However, the crown pruning my need to be substantial, which would have an adverse impact on local character until the trees recover and grow back to their unpruned size.

More detail on how this will be done is explained in section 2 of this report, and in SGN7 Excavating in RPAs and SGN10 Installing structures in RPAs. It is anticipated that adhering to this guidance will allow all trees to be retained without any long term detrimental impact on tree health, but there may need to be some pruning that will temporarily adversely impact on local character.

Pollution control in RPAs

Wet concrete will be poured within RPAs and this will need to be carefully managed to ensure that there is no contamination through spillages or seepage out into adjacent soil. In principle, this will require the excavations to be lined with an impermeable membrane, with similar precautions to contain spillages.

More detail on how this will be done is explained in section 2 of this report, and in SGN4 Pollution control. It is anticipated that adhering to this guidance will allow all trees to be retained without any long term detrimental impact on tree health, and therefore no significant adverse impact on local character.

1.6 Summary of impact on local character

No trees will be removed because of this proposal, but some may need to be pruned. One hedge will need to be removed, but this impact can be mitigated by new planting. The construction activity could affect all the trees if appropriate protective measures are not taken. However, if adequate precautions are specified and implemented through the arboricultural method statement included in this report, it is feasible for all the trees to be retained without any long term detrimental impact on tree health, and therefore no significant adverse impact on local character. If trees do need to be pruned, this will affect local character in the short term, but that impact would reduce over time as the trees recover and grow back to their unpruned size.

2: Arboricultural method statement

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2.1 Site Guidance Notes (SGNs)

This section of the report identifies which trees on this site will be protected and managed, and by what means. This site‐specific summary is supplemented by more detailed explanations and descriptions of specific operations set out in the accompanying Manual for managing trees on development sites. That document is a compilation of 12 individual SGNs addressing the following tree protection and management issues that regularly arise in the construction phase of development:

SGN1 Monitoring tree protection (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn01?stage=Stage)

SGN2 Fencing protected trees (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn02?stage=Stage)

SGN3 Ground protection (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn03?stage=Stage)

SGN4 Pollution control (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn04?stage=Stage)

SGN5 Site cranes & piling rigs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn05?stage=Stage)

SGN6 Height restrictions (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn06?stage=Stage)

SGN7 Excavating in RPAs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn07?stage=Stage)

SGN8 Removing surfacing and structures in RPAs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn08?stage=Stage)

SGN9 Installing/upgrading surfacing in RPAs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn09?stage=Stage)

SGN10 Installing structures in RPAs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn10?stage=Stage)

SGN11 Installing services in RPAs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn11?stage=Stage)

SGN12 Landscaping in RPAs (https://www.barrelltreecare.co.uk/resources/technical‐guidance/sgn12?stage=Stage)

NOTE: Each individual SGN can be downloaded by using the links above and the QR Code links in Appendix 3.

2.2 Identification of areas to be protected

The tree protection plan shows the areas where protective measures are necessary. The approximate fencing location is shown by the heavy black dashed lines (with flexibility to adjust its precise location on site to account for low branches on some of the small trees and trunks on the larger trees), the principal precautionary areas are shown with a yellow outline, and new temporary ground protection is shown by a blue fill.

2.3 Arboricultural supervision

An arboricultural consultant will be appointed to advise on the tree management for the site and to attend:

a pre‐commencement meeting before any work starts;


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regular supervision visits to oversee the agreed tree protection, as agreed at the pre‐commencement meeting; and

further supervision visits, as necessary, to oversee any unexpected works that could affect trees.

The detail of how the arboricultural supervision will be carried out is explained in SGN1 Monitoring tree protection in the accompanying Manual.

2.4 Table 2: Summary of the site operations requiring arboricultural input

For this site, arboricultural input will be needed for the following operations:

Brief operation summary Trees affected Location of detailed

explanations

Pre‐commencement meeting: Meeting on site with all parties to agree protective measures, as described in SGN1. Will be carried out before any significant site works begin.

All trees SGN1 Monitoring tree protection

Installing fencing and ground protection: Agreed tree protection measures will be installed and checked, as described in SGN2 and SGN3 (See Note 1 below for more detail). Will be completed before any significant site works begin.

All trees fenced, all trunks within the fencing boxed, and ground protection

Tree protection plan, SGN2 Fencing protected trees, and SGN3 Ground protection

Pollution control near retained trees: Any pollution control measures identified during risk assessment will be installed as described in SGN4. Will be completed before any potential pollutants arrive on site.

All trees SGN4 Pollution control

Operation of site cranes and piling rigs: Provision will be made to prevent site cranes and piling rigs damaging trees, as described in SGN5.

All trees SGN5 Site cranes & piling rigs

Regular arboricultural supervision: Provision will be made to carry out and record agreed arboricultural supervision, as described in SGN1.


Excavating in RPAs: These operations will be carried out as described in SGN7 (See Note 2 below for more detail).

All trees SGN 7 Excavating in RPAs

Removing surfacing and structures in RPAs: These operations will be carried out as described in SGN8.

All trees SGN8 Removing surfacing and structures in RPAs

Installing structures in RPAs: These operations will be carried out with care, as described in SGN10.

All trees SGN10 Installing structures in RPAs

Removing tree protection: Protection can only be removed when there is no risk of damage to retained trees, as described in SGN1.


The operations summarised in this table, and supplemented by the more detailed explanations set out in the SGNs and the rest of this document, form the arboricultural method statement for this site. The Site Manager will ensure that its details and any agreed amendments are known and understood by all site personnel. Copies of the agreed documents will be available on site. All personnel who could have an impact on trees will be briefed on the specific tree protection


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requirements as part of the site induction procedures. This requirement will be written into the site management documentation. If unanticipated issues arise on site not referenced in the above explanations, further guidance on how to manage them can be found in the accompanying Manual.

NOTE 1: Fencing and ground protection

SGN2 Fencing protected trees and SGN3 Ground protection explain the detail of installing fencing and ground protection. The location shown on the plan is approximate and intended to be intelligently interpreted on site to fit around the lower branches of the smaller trees and the trunks of the larger trees with minimal adverse impact on them. The soil surfaces needing ground protection slope to varying degrees throughout the length of the site and this will need to be accounted for in the ground protection. This will require a customised solution to provide a level working area like the approaches shown in SGN3 images SGN3‐02 and SGN3‐04.

NOTE 2: Protocol of managing the discovery of roots during the excavations

1. SGN7 Excavating in RPAs explains the detail of excavating in RPAs.

2. All excavations will be carried out by hand or with air tools as set out in bullet points 7, 8, and 9, in SGN7.

3. Discovery of individual roots or clumps less than 2.5cm width that need to be cut can be removed without consulting the supervising arboriculturist.

4. Discovery of individual roots or clumps 2.5–10cm in width that need to be cut will be notified to the supervising arboriculturist. The supervising arboriculturist will decide if the roots can be cut or if a design change needs to be considered.

5. Discovery of individual roots or clumps greater than 10cm in width that need to be cut will be notified to the supervising arboriculturist. The supervising arboriculturist will decide if the roots can be cut or if a design change needs to be considered. If a design change cannot be made and the roots must be cut, a decision will be made and copied to The Royal Parks and Westminster City Council to provide an opportunity for input.

6. If cutting large roots is unavoidable, and that operation may adversely affect tree stability, crown reduction may be necessary to remove significant risks. These are matters that would be agreed with The Royal Parks and Westminster City Council in advance of any works being carried out.

2.5 Construction method statement (heads of terms summary)

A construction method statement is a description of how operations that may affect trees will be carried out to minimise any adverse impact on them. The details of how the site will be managed are construction and contractual matters that can only be finalised once the post‐consent detailed planning begins. For that reason, at this stage in the planning process, as explained in clause 5.5.6 of BS 5837, it is normally sufficient to list a heads of terms summary of the issues requiring more detailed consideration once consent is issued. On this site, those issues are likely to include:

1. Preparation of a written site management protocol for dealing with tree issues, to be incorporated into formal site management procedures, and to specifically include induction training for all operatives related to tree protection.

2. The order of work on site, including the installation of protective measures, the phasing of successive work locations, the removal of existing structures, the installation of new structures, the removal of tree protection, and any necessary reinstatement.


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3. Erection and maintenance of tree protection measures.

4. Who will be responsible for protecting the trees on site.

5. Detailed proposals for inspecting and supervising the tree protection.

6. How accidents and emergencies involving trees will be managed, including accidental damage to roots and their treatment.

7. A schedule of emergency contact numbers relating to trees.

8. Areas for loading and unloading of materials and storage of materials and plant.

9. Where site facilities will be located and when will they be installed.

10. How machinery and equipment (such as excavators, cranes and their loads, concrete pumps and piling rigs) will enter, move on, work on, and leave the site.

11. Pollution control to specifically consider chemical storage and wheel washing facilities in relation to trees.

12. Recycling and storage of waste in relation to trees.

13. Details of earthworks, grading and mounding and removal of spoil, including any planned lowering or raising of ground levels.

14. Precise services locations, including the method of excavation when near trees.

15. How and when any temporary surfacing will be laid and removed.

16. How post‐construction impacts through compaction to soil near trees will be ameliorated.

Appendix 1: Background administrative information and data collection

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A1.1 Table 3: Background administrative information

Background administrative information

Report date & reference 30/07/18; 18214‐AA‐300718‐JB

Tree protection plan reference

BT1

Instructing client Conway Consulting Services

Instructions

Visit the site, assess the relevant trees, prepare a schedule of their details, describe the impact of the proposal on those trees, and identify the tree protection issues in an arboricultural method statement with a tree protection plan

Provided documents Topographical survey, drawing number M‐GA‐01‐04‐MFD, received by email on 22nd June 2018, and layout drawing number 238038‐04M 610, received by email on 30th July 2018

Report author and credentials

Jeremy Barrell is a Chartered Forester (www.charteredforesters.org) and an AA Registered Consultant (www.trees.org.uk), and fully qualified to undertake the assessments in this report. Further details of his credentials can be found at https://www.barrelltreecare.co.uk/assets/Uploads/J‐Barrell‐CV.pdf.

Report limitations This report does not consider ecological or archaeological issues, or any

other matter beyond the assessment of the trees.

Technical references

In preparing the analysis in this report, we considered the guidance and advice in the following technical references:

Climate Change Act (2008) www.legislation.gov.uk/ukpga/2008/27/contents

Town and Country Planning Act 1990 www.legislation.gov.uk/ukpga/1990/8/contents

National Planning Policy Framework, published by the DCLG www.gov.uk/government/publications/national‐planning‐policy‐framework‐‐2

BS 5837 (2012) Trees in relation to design, demolition and construction – Recommendations, BSI www.shop.bsigroup.com/

BS 8545 (2014) Trees: from nursery to independence in the landscape – Recommendations, www.shop.bsigroup.com/

BS 3998 (2010) Tree work – Recommendations, BSI www.shop.bsigroup.com/

Trees in the Townscape: A Guide for Decision Makers, published by the

Trees & Design Action Group http://www.tdag.org.uk/ Trees in Hard Landscapes: A Guide for Delivery, published by the Trees &

Design Action Group www.tdag.org.uk/ National Joint Utilities Group (2007) Volume 4, Issue 2: Guidelines for the

planning, installation and maintenance of utility apparatus in proximity to trees www.njug.org.uk/publications/

Appendix 1: Background administrative information and data collection

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A1.2 Table 4: Data collection

Data collection

Date of site visit 10th July 2018

People present during site visit

Jeremy Barrell

Weather & visibility Dull, still, and dry, with good visibility

Limitations to observations

The inspection of the trees for the purposes of assessing their condition and work requirements was made on the basis that they will be annually inspected in the future to identify any changes in condition and review the original recommendations. For these reasons, the tree assessment advice only remains valid for one year from the date that the trees were last inspected.

All observations were of a preliminary nature and did not involve any climbing or detailed investigation beyond what was visible from accessible points at ground level.

Observations of trees outside the site boundaries are confined to what was visible from within the site.

All dimensions were estimated unless otherwise indicated.

Tree Preservation Orders (TPOs), Conservation Areas, and tree categorisation

The site is in a Conservation Area.

Tree location and numbering

Each tree and hedge was inspected, and the numbering scheme is indicated on the tree protection plan.

Recording of tree data For each identified tree and hedge, the information collected was recorded on the tree schedule in Appendix 2 and the tree protection plan.

Compliance of data collection with BS 5837

The data collection is fully compliant with the advice in subsection 4.4.2 of BS 5837. When collecting this information, specific consideration was given to any low branches that may influence future use, age class, physiological condition, structural condition, and remaining contribution. Where appropriate, crown spreads were also noted where they differed from those shown on the provided land survey.

Calculation of RPAs

Following the recommendations in Table D1 of BS 5837, the diameter of each tree was rounded up to the next 2.5cm increment, with the radius of a nominal circle and the resultant RPA taken directly from that table. This information is listed for each tree in the tree schedule in Appendix 2.

Appendix 2: Tree schedule and explanatory notes

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NOTE: Colour annotation is A & B trees with green background; C & U trees with blue background; trees to be removed in red text.

Tree No Species Height (m)

Diameter (cm) @ 1.5m

Maturity Low Branches Category Notes Tree Works RPA radius

(m) RPA area

(m2)

All retained

trees Carry out safety check

T1 London plane (5030) 30 110* Mature - A - 13.2 547

T2 Thorn sp (5081) 5 15* Maturing - C Small tree - 1.8 10

T3 Crab sp (5080) 4 15* Maturing - C - 1.8 10

T4 London plane 18 52.5 Maturing - A On street - 6.3 125

T5 Thorn sp 6 20* Maturing - C Small tree - 2.4 18

T6 Thorn sp 5 15* Maturing - C Small tree - 1.8 10

T7 Thorn sp (5085) 6 20* Maturing - C Small tree - 2.4 18

T8 Silver-leaved lime 6 12.5* Young - C Small tree - 1.5 7

T9 London plane 12 30* Maturing - C On street, interfering with adjacent tree - 3.6 41

T10 Horse chestnut (5040) 14 42.5* Maturing - B Growing as a group - 5.1 82

T11 Horse chestnut (5042) 13 37.5* Maturing - B Growing as a group - 4.5 64

T12 Catalpa (5044) 16 35* Maturing - B Slightly suppressed by adjacent tree - 4.2 55

T13 London plane 18 50* Maturing - A On street - 6.0 113

T14 Crab sp 6 20* Maturing - C Small tree - 2.4 18

T15 Crab sp 2 5 Young - C Small tree - 0.6 1

T16 Field maple 5 20* Young - C Small tree - 2.4 18

T17 Crab sp 2 5 Young - C Small tree - 0.6 1

T18 London plane (43000) 30 122.5* mature - A - 14.7 679

T19 London plane 10 25 Maturing - U Dead - 3.0 28




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Tree No Species Height (m)

Diameter (cm) @ 1.5m

Maturity Low Branches Category Notes Tree Works RPA radius

(m) RPA area

(m2)


T23 London plane (43005) 30 107.5* Mature - A - 12.9 523


T25 London plane (43007) 18 50* Maturing - A - 6.0 113

T26 London plane 5 5 Young - C Small tree - 0.6 1


T28 London plane 25 100* Mature - B Interfering with adjacent tree - 12.0 452

T29 London plane 8 15 Maturing - C Young tree - 1.8 10




T33 London plane (43016) 30 97.5 Mature - A - 11.7 430

T34 London plane (43017) 30 102.5* Mature - B Active basal fungal bracket - 12.3 475

H35 Holly sp 2 15 Maturing - C Clipped hedge Fell 1.8 10


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Explanatory Notes

Abbreviations: H: Hedge T: Tree

Botanical tree names: Catalpa : Catalpa bignonioides Crab : Malus sp Field maple : Acer campestre Holly : Ilex sp Horse chestnut : Aesculus hippocastanum London plane : Platanus x hispanica Silver‐leaved lime : Tilia tomentosa Thorn : Crataegus sp

BS 5837 (2012) compliance: All data has been collected based on the recommendations set out in subsection 4.4 of BS 5837.

Tree inspections and site limitations: Each tree was subjected to a quick visual check level of inspection. Where there is restricted access to the base of a tree, its attributes are assessed from the nearest point of access. Climbing inspections are not carried out during this level of inspection and, if heavy ivy is present, tree condition is assessed from what can be seen from the ground. A separate note is recorded if further investigation may be required to clarify its status.

Crown spreads: Crown spread dimensions are not listed in the tree schedule because they are illustrated on the land survey base to all the plans in this document.

Dimensions: All dimensions are estimated unless advised as measured.

Species: Species identification is based on visual observations. Where there is some doubt over tree identity, sp is noted after the genus name to indicate that the species cannot be reliably identified at the time of the survey. Where there is more than one species in a group, only the most frequent are noted and not all the species present may be listed.

Height: Height is estimated to provide a broad indication of the size of the tree.

Trunk diameter: Trunk diameter is estimated or measured and recorded in 2.5cm increments as advised in BS 5837 Table D1. It is measured with a diameter tape unless access is restricted, direct measurement is not possible because of ivy on the trunk or the tree is assessed as low quality. The point of measurement and the adjustments for stem variations are as advised in Figure C1 of BS 5837.

Maturity: In planning context, maturity provides a simplistic indication of a tree’s ability to cope with change and its potential for further growth. For the purposes of this report, young indicates a potential to significantly increase in size and a high ability to cope with change, maturing indicates some potential to increase in size and a medium ability to cope with change, and mature indicates little potential to increase in size and limited ability to cope with change.

Low branches: Any low branches that would not be feasible for removal during normal management and should be considered as a design constraint are noted here and explained in the notes.

Category: Our assessment automatically considered tree physiological/structural condition (BS 5837, 4.4.2.5h), and so these are not listed separately in the schedule. Additionally, the category accounts for the remaining contribution (BS 5837, 4.4.2.5i) as greater than 40 years for A trees, greater than 20 years for B trees, at least 10 years for C trees and less than 10 years for U trees, so this is also not listed separately in the schedule. Category A, B, and C trees are automatically listed as sub‐category 1 unless otherwise stated.

Notes: Only relevant features relating to physiological or structural condition and low branches that may help clarify the categorisation are recorded. If there are no notes, then the presumption should be that no relevant features were observed.

Future tree safety inspections: Due to the time that may elapse between the original survey and the start of development, all trees should be re‐inspected as part of the standard risk management process before any works start on site. Our assessment of the trees was carried out on the basis that a re‐inspection would be carried out within a year of the assessment visit and our advice on tree condition must be reviewed annually from the date of that visit.

Appendix 3: QR Codes for SGNs (Scan with reader to download)

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SGN1 Monitoring tree protection SGN2 Fencing protected trees SGN3 Ground protection

SGN4 Pollution control SGN5 Site cranes & piling rigs SGN6 Height restrictions

SGN7 Excavating in RPAs SGN8 Removing surfacing and

structures in RPAs SGN9 Installing/upgrading

surfacing in RPAs

SGN10 Installing structures in RPAs

SGN11 Installing services in RPAs SGN12 Landscaping in RPAs

Documents

Arboricultural assessment & method statement